ddn man page on 4.4BSD

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DDN(4)		       BSD/vax Kernel Interfaces Manual			DDN(4)

NAME
     ddn — DDN Standard Mode X.25 IMP interface

SYNOPSIS
     device ddn0 at uba0 csr 166740 vector ddnintr

DESCRIPTION
     The ddn device provides a DDN Standard Mode X.25 interface to an IMP
     using the ACC ACP625 X.25 board.  It is normally used for connecting to
     the Defense Data Network (DDN).  The controller itself is not accessible
     to users, but instead provides a network interface for the Internet Pro‐
     tocol described in ip(4).

DIAGNOSTICS
     ddn%d: not alive.	The initialization routine was entered even though the
     device did not autoconfigure.  This indicates a system problem.

     ddn%d: failed getting UBA resources for lcn %d."  Insufficient UNIBUS
     resources existed to initialize the device.  This is likely to be a
     shortage of UNIBUS mapping registers.

     ddn%d: couldn't get X25 init buffer.  This indicates that an mbuf could
     not be allocated for sending the initialization message to the ACP625.

     DDN: illegal X25 address length!
     DDN: illegal X25 address format!  These errors indicate a problem with
     the called X.25 address received from the IMP on an incoming call.

     X25 RESET on lcn = %d.  This indicates that an unexpected X.25 RESET was
     received on the indicated LCN.

     X25 INTERRUPT on lcn = %d, code = %d.  This indicates that an unexpected
     X.25 INTERRUPT Packet was received on the indicated LCN.

     ddn%d: failed to get supr msg bfr!	 This indicates that an mbuf could not
     be allocated for sending a supervisor message to the ACP625.

     Any other error message from ‘ddn%d:’ indicates a serious error detected
     by either the driver or the ACP625 firmware.

SEE ALSO
     netintro(4), ip(4)

HISTORY
     The ddn interface appeared in 4.3BSD.

4.3 Berkeley Distribution	 June 5, 1993	     4.3 Berkeley Distribution
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